Revert "Refactor envelope handling to use ISQLExecutor"

This reverts commit 4cabaf3191.

EnvelopeGenerator.Infrastructure/DependencyExtensions.cs

@@ -82,6 +82,8 @@ public static class DIExtensions
         SetDapperTypeMap<DocumentReceiverElement>();
         SetDapperTypeMap<DocumentStatus>();
 
+        services.AddScoped<IEnvelopeExecutor, EnvelopeExecutor>();
+
         if (sqlExecutorConfiguration is not null || sqlExecutorConfigureOptions is not null)
             services.AddSQLExecutor(sqlExecutorConfiguration, sqlExecutorConfigureOptions);